基于瞬变电磁法的采空区含水体分布探测

为探明采空区含水体层次结构、展布范围以及富水状况,以黑龙江省鸡东县某矿为例,根据不同赋存状态下岩层、煤层、采空区及其含水层电阻率的差异,采用PROTEM瞬变电磁仪进行地面探测,分析采空区含水体的二次场变化情况,捕捉低阻异常体,进而反演成像。结果表明：测区内局部地段塌陷裂隙、断层发育明显;1、3号异常区为采空区含水体,2号异常区为断层裂隙含水体。瞬变电磁法探测结果与现场钻探结果一致。该方法为煤矿防治水工作、煤矿水害事故应急救援及煤炭资源整合提供了可靠的技术支持。

Detection of goaf water-contained distribution based on transient electromagnetic method

Aimed at identifying goaf water-contained hierarchical structure, distribution range and water-bearing situation, this paper draws on the difference of rock, coal, goaf and aquifer resistivity in different occurrence, as is evident in a mine of Jidong Country in Heilongjiang Province and introduces the efforts to achieve ground detection using transient electromagnetic instrument, analyze the change of goaf water-contained secondary filed, catch low resistance abnormal body and thus inverse imaging. The results reveal the occurrence of well-developed fissures and faults in local detection zone, the presence of water-contained goal in No. 1 and No. 3 anomalies, and the presence of water-contained fissure and in No. 2 anomaly area. The transient electromagnetic method detection produces results consistent with those from field drilling and promises a reliable technology in mine water control, mine flooding accident emer- gency rescue and coal resources integration.